Price is one of indispensable (必不可少的) elements of marketing mix. Pricing a product must follow the principle: the price must be high enough to cover costs and make a profit, but low enough to attract customers. There are a number of pricing strategies. The most commonly used are:• Cost pricing (成本定价法): this is the most common form of pricing. Costs are totaled and a margin (利润) is added on for profit to make the total price.• Market penetration pricing (市场渗透定价法):charging a low price, possibly not quite covering costs, to gain a position in the market.